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annotate sat/tools/common/regex.py @ 3728:b15644cae50d

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component AP gateway: JID/node ⟺ AP outbox conversion: - convert a combination of JID and optional pubsub node to AP actor handle (see `getJIDAndNode` for details) and vice versa - the gateway now provides a Pubsub service - retrieve pubsub node and convert it to AP collection, AP pagination is converted to RSM - do the opposite: convert AP collection to pubsub and handle RSM request. Due to ActivityStream collection pagination limitations, some RSM request produce inefficient requests, but caching should be used most of the time in the future and avoid the problem. - set specific name to HTTP Server - new `local_only` setting (`True` by default) to indicate if the gateway can request or not XMPP Pubsub nodes from other servers - disco info now specifies important features such as Pubsub RSM, and nodes metadata ticket 363
author Goffi <goffi@goffi.org>
date Tue, 25 Jan 2022 17:54:06 +0100
parents 85b8a899f407
children 524856bd7b19
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1 #!/usr/bin/env python3
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2
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4 # Salut à Toi: an XMPP client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 """ regex tools common to backend and frontends """
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21
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22 import re
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23 import unicodedata
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25 path_escape = {"%": "%25", "/": "%2F", "\\": "%5c"}
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26 path_escape_rev = {re.escape(v): k for k, v in path_escape.items()}
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27 path_escape = {re.escape(k): v for k, v in path_escape.items()}
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28 #  thanks to Martijn Pieters (https://stackoverflow.com/a/14693789)
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29 RE_ANSI_REMOVE = re.compile(r'\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/]*[@-~])')
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30 RE_TEXT_URL = re.compile(r'[^a-zA-Z0-9,_]+')
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31 TEXT_MAX_LEN = 60
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32 # min lenght is currently deactivated
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33 TEXT_WORD_MIN_LENGHT = 0
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36 def reJoin(exps):
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37 """Join (OR) various regexes"""
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38 return re.compile("|".join(exps))
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41 def reSubDict(pattern, repl_dict, string):
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42 """Replace key, value found in dict according to pattern
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43
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44 @param pattern(basestr): pattern using keys found in repl_dict
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45 @repl_dict(dict): keys found in this dict will be replaced by
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46 corresponding values
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47 @param string(basestr): string to use for the replacement
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48 """
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49 return pattern.sub(lambda m: repl_dict[re.escape(m.group(0))], string)
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51
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52 path_escape_re = reJoin(list(path_escape.keys()))
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53 path_escape_rev_re = reJoin(list(path_escape_rev.keys()))
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56 def pathEscape(string):
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57 """Escape string so it can be use in a file path
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58
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59 @param string(basestr): string to escape
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60 @return (str, unicode): escaped string, usable in a file path
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61 """
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62 return reSubDict(path_escape_re, path_escape, string)
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65 def pathUnescape(string):
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66 """Unescape string from value found in file path
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68 @param string(basestr): string found in file path
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69 @return (str, unicode): unescaped string
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70 """
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71 return reSubDict(path_escape_rev_re, path_escape_rev, string)
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74 def ansiRemove(string):
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75 """Remove ANSI escape codes from string
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77 @param string(basestr): string to filter
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78 @return (str, unicode): string without ANSI escape codes
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79 """
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80 return RE_ANSI_REMOVE.sub("", string)
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83 def urlFriendlyText(text):
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84 """Convert text to url-friendly one"""
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85 # we change special chars to ascii one,
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86 # trick found at https://stackoverflow.com/a/3194567
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87 text = unicodedata.normalize('NFD', text).encode('ascii', 'ignore').decode('utf-8')
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88 text = RE_TEXT_URL.sub(' ', text).lower()
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89 text = '-'.join([t for t in text.split() if t and len(t)>=TEXT_WORD_MIN_LENGHT])
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90 while len(text) > TEXT_MAX_LEN:
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91 if '-' in text:
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92 text = text.rsplit('-', 1)[0]
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93 else:
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94 text = text[:TEXT_MAX_LEN]
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95 return text